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If a 20.071g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 70.659 g of water. An 11.772 g aliquot of this solution is subsequently titrated with 0.1068 M HCl. It needed 30.77mL of the HCl solution to reach the methyl red endpoint. Compute the weight percent NH3 in the aqueous waste.
How large would the lattice energy need to be for the formation of NaCL2 to be exothermic. b. If we were to estimate the lattice energy of NaCl2 to be roughly equal to that of MgCl2
What is the entropy change for a particle in this system if the final number of microstates is 0.680 times that of the initial number of microstates
Lexan is a plastic used to make compact discs, eyeglass lenses, and bullet-proof glass. One of the compounds used to make Lexan is phosgene (COCl2), an extremely poisonous gas. Phosgene decomposes by the reaction
describe an incident fire spill explosion etc you have experienced or research one on the internet professional journal
a peice of iron mass25.0 g at 398 k is placed in a styrofoam coffee cup containing 25.0 ml of water at 298 k. assuming
what are the freezing point and boiling point of an aqueous solution of 15.5g glucose (c6h12o6) dissolved in 150 g of water?
at 25 c and 1.0 atm pressure, it is found that 2.24 L of gas weighs 1.56g. The molar mass of the gas is?
The reaction (CH3)3 CBR+ OH------)(CH3)3 COH+Br in a certain solvent is first order with respect to (CH3)3 CBr and zero order with respect to OH. In several experiments, the rate constant k was determined at different temperatures. Determine the a..
Write the chemical equation for the dissociation of the salt into its ions. Write the expression for Ka or Kb and give the value of Ka or Kb 1. 1.0M NaC2H3O2 pH=7.45 2. 1.0M NaHCO3 pH=8.60 3. 1.0M Na2CO3 pH=11.62 4. 1.0m NH4Cl pH=3.98
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles.
A J tube is filled with air at 22C and 760 Torr. The long arm is closed off at the top and is 100 cm long. The short arm is 40 cm. Mercury is poured into the short arm with a funnel. What is the pressure on the air when Hg starts to spill out.
copper in salt water near the discharge of a sewage treatment plantis determined by first seperating and concentrating
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